MTX changing the functionality of a skill (item)?

Been having a blast with the game so far but I encountered what I think is a bug. I purchased the King of the Faridum pack which makes you hover instead of normally walking (it also changes the dodge animation).

Earlier today I got my first unique, Corpsewade, which grants the decompose ability and allows you to trigger it on step. While using the Lord of Ogham armour set (or any other that doesn't change your walk animation) this skill functions perfectly, but as soon as I equip the King of the Faridum one it stops working completely, as you are no longer taking steps (again, you're hovering).

Is it a bug or realistic feature?